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UNIT 1 LO3 NETWORK AND SYSTEMS Flashcards

1
Q

What is a server?

A

A powerful dedicated system on a network requiring increased memory, storage, and processing power than traditional computers.

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2
Q

What is a File Server?

A

A server that centrally stores and manages files for network access.

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3
Q

What is one benefit of using a File Server?

A

It can automatically backup files as per the organisation’s disaster recovery policy.

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4
Q

What is a Printer Server?

A

A server that controls printers on a network and manages printing requests.

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5
Q

What is an Application Server?

A

A server that allows users to access shared applications on a network.

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6
Q

What is one advantage of using an Application Server for updates?

A

Application updates can be deployed to the server only, saving time.

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7
Q

What is a Database Server?

A

A server that manages database software accessible to users on the network.

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8
Q

How is data manipulated on a Database Server?

A

Using query languages such as SQL.

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9
Q

What is a Web Server?

A

A server that manages HTTP requests to display web pages on browsers.

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10
Q

What does a Mail Server do?

A

Sends and receives emails using protocols like SMTP and POP.

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11
Q

What function does a Mail Server have regarding company address books?

A

It can store company address books for easier internal communication.

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12
Q

What is a Hypervisor?

A

A technology that allows a host machine to operate virtual machines as guest systems.

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13
Q

What is the purpose of virtualisation in relation to a Hypervisor?

A

It enables guest machines to share the resources of the host while remaining isolated.

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14
Q

What is virtualisation?

A

Virtualisation is the creation of a virtual version of a device, software, operating system or server. These virtual versions can then be run on a different physical computer system, such as a powerful server.

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15
Q

What is storage virtualisation?

A

Storage virtualisation combines multiple separate storage devices into acting and appearing like a single, central storage system.

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16
Q

What are the benefits of storage virtualisation?

A

Using storage virtualisation improves scalability as further devices can join the storage system if more space is required. It also simplifies the management of storage across the network.

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17
Q

What is server virtualisation?

A

Server virtualisation allows one physical server to be divided into and host multiple virtual servers, each running separately.

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18
Q

How does server virtualisation improve resource use?

A

Each virtual server operates independently, handling its own operating system and applications, allowing for resources to be used more effectively.

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19
Q

What is client virtualisation?

A

Client virtualisation is when several virtual desktops are run on a single server, where the processing happens remotely.

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20
Q

What are ‘dumb clients’?

A

These are virtual clients that have minimal resources like a slow processor and little memory/storage because the server does the processing.

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21
Q

What are the general benefits of virtualisation?

A

Benefits include lower long-term costs, higher performance at a lower cost, secure testing environments, and simplified disaster recovery.

22
Q

What are the drawbacks of virtualisation?

A

Drawbacks include potential performance issues, greater impact from physical system failures, complex initial setup, and increased security risks.

23
Q

What are the benefits of client virtualisation?

A

Benefits include central data storage for easier backup, managed security and updates from the server, reduced hardware costs, and remote access to multiple virtual machines.

24
Q

What are the drawbacks of client virtualisation?

A

Drawbacks include inability to work without network connectivity, high server strain, potential poor performance with multiple connections, and security risks from centralized data storage.

25
What is cloud technology?
'The cloud' is storage accessed through a network, primarily the internet, and a cloud server is an example of storage virtualisation.
26
What is a private cloud?
A private cloud is where a business has its own data centre that employees can access, allowing for flexible data storage and control over data management and security.
27
What is a public cloud?
Public cloud uses third-party service providers to provide storage over the internet, usually as a pay-for-use service.
28
what is client server network
Clients make requests to a server, the server manages that request and responds. The server controls network security, backups and can be upgraded to manage higher demand.
29
advantages client server network
-network controlled centrally, easily backup data and update software -hardware, software and resources shared across network -improved scalability easily added to central server
30
disadvantages client server network
- traffic congestion cause network to slow down -fault occurs with server whole network will fail -It technicians require to manage and maintain network
31
what is peer to peer network
data is shared directly between systems without requiring central server. optimal for sharing files to download
32
advantages of peer to peer network
-simpler network than client server to set up as no server is required -clients not dependent on a server -quickly sharing files between systems
33
Disadvantages of peer to peer network
-no central device to manage security or backups -performance decrease with more devices
34
What is Bus Topology
-nodes connected to a bus (central cable which transfers all data on network )
35
Advantages of bus topology
-easy to attach another system without disturbing network -quick to set up optimal for temporary networks -cost effective les cabling and no extra hardware
36
disadvantages of bus topology
-poor security data packets passed on to each system -data collisions are likely -main cable had limited length
37
what is star topology
each computer system is connected to central node a hub or a switch and transfers data packets through here- hub/switch looks at destination and transfers packets to intended computer
38
advantages of star topology
-improved security as data packets sent directly to and from switch/hub -transfer speeds fast, minimal network collisions
39
disadvantages of star topology
-extra hardware is required needs purchased installed and maintained -if central system fails then whole network unstable
40
what is mesh topology
each computer system is connected to every other computer system data packets transferred destination address along quickest path
41
advantages of mesh topology
-data packets can take alternative route -withstand large amounts of data traffic -new ssytems can be added without disrupting entire toplogy
42
disadvantages of mesh topology
- large amount of cables required expensive to install and maintain -redundant cabling avoided- cables connected between systems and wont need to communicate
43
subnet mask
dividing a physical network into smaller sub networks known as subnets to help reduce traffic
44
Local area network
network in which computer system are located geographically close to each other e.g. same building school or office
45
Metropolitan area network
connects several LANs together to cover range of a town or city e.g. unviversity campus
46
wide area network
network over large geographical area e.g. multiple cities or countries
47
ADSL
method of transferring data across copper wires telephone lines
48
leased line
unconnected fixed bandwidth data connection
49
Management information system MIS
used to collect, store, analyse and present data. processes large amount of data and organises so can be used for decision making and data analysis
50
customer relationship management CRM
used to improve relationship between organisation and its customers. improve customer loyalty and increase customer base by attracting new customers= result in more sales higher profits
51
standard operating procedure SOP
comprehensive step by step guide how to carry out business routine will create SOP to abide legal requirements
52
sales ordering process SOP 3 step guide
1. customer orders product or service 2. order is confirmed and sales order created- document lists customers requirements 3.sales order sent to relevant departments- once order completed customer will be sent invoice for payment

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